Boom! Swiss train travel is so expensive. Most people that live there buy a "half day" pass. It like a yearly membership to the SBB that gets all tickets 1/2 price. Investigate to see if your doing enought travel in la suisse to warrant picking one up. saving 50% on a 220CHF ticket is a fair play.check: http://www.sbb.ch/pv/halbtaxkombi_e.htm

Yeah, there are a very few places that are more amazing to see, especially by rail. I especially like the trip from Schwyz-Lugano. unreal.

I checked on the Rail Europe website, and there is a few Swiss Rail options for you that are vaild on trains and ferries. Go here to see which pass would suit you best: http://www.raileurope.com/us/rail/passes/switzerland_index.htm

A cheaper option (depending on your age) could be the Interrail pass, which is only availible to EU citizens. I clicked on the UK-resident option, and it gave me a price list. If you're under 26, I say use this instead! It's such a better deal!http://www.interrail.com/home.asp?AFF=IR

(And for the record, rail passes usually work out cheaper than buying individual tickets, but you can call ahead and see which option is better for you )

The prices for either option are still quite expensive if you are only going for six days. You said that you want to take a scenic trip, so why not ask a travel agent if you can get a special "Scenic Switzerland" package that would include transport. I don't know if such a thing exsists, but it's worth trying.